Sport is an activity that is governed by a set of rules or customs and often engaged in competitively. Used by itself, sports commonly refer to activities where the physical capabilities of the competitor are the sole or primary determiner of the outcome (winning or losing), but the term is also used to include activities such as mind sports and motor sports where mental acuity or equipment quality are major factors. Sports are used as entertainment for the player and the viewer. It has also been proven by experiments that daily exercise increases mental strength and power to study. vs. A game is a structured or semi-structured activity, usually undertaken for enjoyment and sometimes also used as an educational tool. (The term "game" is also used to describe simulation of various activities e.g., for the purposes of training, analysis or prediction, etc., see "Game (simulation)".) Games are generally distinct from work, which is usually carried out for remuneration, and from art, which is more concerned with the expression of ideas. However, the distinction is not clear-cut, and many games may also be considered work and/or art. An example of a game is chess. You use your brains to solve the game and win the game. Key components of games are goals, rules, challenge, and interactivity. Games generally involve mental or physical stimulation, and often both. Many games help develop practical skills, serve as a form of exercise, or otherwise perform an educational, simulational or psychological role. Known to have been played as far back as prehistoric times, games are a universal part of the human culture, for all experiences, genders and ages.